Support for electric conductors.



0. MUELLER & W. D. HAMER.

SUPPORT FOR ELECTRIC CONDUCTORS.

APPLICATION FILED IAN- 2I. I9I5.

Patented Nov. 13, 1917.

Ottofifueller and fidnzer p, STATES PATENT OFFICE.

OTTO MUELLER, O1 OHICAGO, ILLINOIS, AND WILLIAM D. HAMEB, OFINDIANAPOLIS,

INDIANA, ASSIGNOBS TO, ELECTRIC SERVICE SUPPLIES COMPANY, OF PHILADEL-PHI A, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

SUPPORT FOR ELEeTErc cormuc'rons;

Specification Letters Patent. P t t Ngv, 13, 1917,

Applicatiomflled January 21, 1915. Serial No. 3,447.

To all whom it may concern:

Be it known that we, OTTO MUELLER and WILLIAM D. HAMER, citizens of theUnited I States, and residents, respectively, of Chi- 5 cago, in thecounty of Cook and State of Illinois, and Indianapolis, in the county ofMarion and State of Indiana, have jointly invented an Improved Supportfor Electric Conductors, of which the following is a specification.

Our invention is an electric conductor support adapted to be applied tothe tops of poles, and it is characterized by the desiderata that it issimple, strong, balanced,

readily installed securely, applicable to sections of differentthicknesses without inju ,rious cutting, and designed to hold conductorsin symmetrical relation, in dilferentvertical planes, so that verticaland lateral pressures are carried economically and efficiently whileshort circuiting is avoided in case of,

broken conductors. p I

The improvements characteristic of our invention will more fully appearfrom the following description and the accompanying drawings inillustration thereof.

In the drawings, Figure 1 is an elevation of a support embodying ourimprovements in operative position, and Fig. 2 is a plan view of thesame below the line 2-2 of Fig. l.

The "support, in the form thereof here selected for the purpose ofillustrating the invention, comprises the angle iron cross-arm 1 havingits median section bent laterally so 85 that its leg or web 1 shall beexterior to the arch produced and its leg or web 1 shall have a flat,comparatively extended bearing against the pole 2 with the ends of thearm in alinement with the center of the pole, the

legs of the angle providing the desired resistance to vertical andlateral bending stresses. A yoke 3, preferably formed of strap iron,approximately the width of the leg lff, comprises the flat crown 3 thediverging .similar sections 3* extending transversely thereto, theapproximately parallel similar sections 3 extending from the sections3", the diverging similar sections 3 extending from the sections 3, andthe flanges 3 extending outwardly in a common plane from the free endsof the sections 3. The yoke is fixed in transverse relation to the crossarm by securing the flanges 3 to the web 1,,on its side opposite the web1 by means of bolts 4, placed equally distant from,the ends of thecross-arm.

symmetricall with reference to the axial plane thereo by fitting theexpanded ends of the sections 3 to the end of the pole and the sections3 to opposite sides thereof, and passing the bolts 5 transverselythrough the pole and the parts 3. The cross bar is fixed in place bypassing the bolt 6 through the web 1 and the post 2 transversely to thebolts 5.

The insulator 7 is fixed to the crown 3 by the bolt 8, centrally withreference to the support and pole, the open space between the parts 2, 3and 3 permitting free manipulation for this purpose. The insulators 9are fixed to the ends of the arm 1, on the web 1, by the bolts 10passing therethrough outside of the bolts 4 at points equidistant fromthe bolt 6 at the center of the arm.

Since the parts 1 and 8 can be fitted to the pole by shaving the woodwith the grain,

if any cutting is required, this operation is readily effected, withoutexposing the cross sect1on of the grain to the weather and the "timberto decay, which takes place where transverse cutting is required to fitcertain forms of supports.

As the parts of the support, including the insulators, are symmetricallyarranged with reference to an axial plane, the load carried will .bebalanced, and as the insulators are in different vertical planes abroken conductor carried by one of them will not fall across a conductorcarried by another with resulting short circuiting.

The. transverse dispositions of the bolts and webs, together with thearrangement of the diagonals 3 and 3 so that each is adapted to takeboth tension and compression, provides the appliance with superiorstrength and capacity for taking both vertical and lateral pressureefliciently.

Having described our invention, we claim:

1. The combination of a cross-arm having an arched median section with aweb bent laterally to form a curved bearing surface The yoke is fixed onthe top oft-he pole, Y

and a bent stiffening web exterior to the bend proximately parallelparts and supporting an object.

2. The combination of a cross-arm having an arched intermediate sectionadapted to fit a pole with said arm disposed transversely thereto, and ayoke having a crown, diverging sections connected with said crown,sections connected with said divergin sections and adapted to fitlongitudina ly against opposite sides of said pole, and divergingsections connected with said second named sections and fixed to saidcrossarm.

3. The combination with a pole, of a crossarm having a bent seatengaging said pole, a yoke having sections engaging opposite sides ofsaid pole longitudinally, a part connected with said sections across theend of said pole, and diagonal members diverging from said sections andfixed to said arm on opposite sides of said seat. I

In testimony whereof,-we have hereunto set our names this 31st day ofDecember, 1914, in the'presence of the subscribing witnesses.

OTTO MUELLER. WILLIAM D. HAMER.

Witnesses as to Otto Mueller:

L. P. SHooP, W. J. KooH. Witnesses as to William D. Hamer:

J. W. PORTER, P. T. BREEN.

